663667542 has 36 divisors (see below), whose sum is σ = 1469279916. Its totient is φ = 216502680.

The previous prime is 663667517. The next prime is 663667559. The reversal of 663667542 is 245766366.

663667542 is a `hidden beast` number, since 6 + 636 + 6 + 7 + 5 + 4 + 2 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 31417 + ... + 48107.

It is an arithmetic number, because the mean of its divisors is an integer number (40813331).

Almost surely, 2^663667542 is an apocalyptic number.

663667542 is an abundant number, since it is smaller than the sum of its proper divisors (805612374).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

663667542 is a wasteful number, since it uses less digits than its factorization.

663667542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16793 (or 16743 counting only the distinct ones).

The product of its digits is 1088640, while the sum is 45.

The square root of 663667542 is about 25761.7457094817. The cubic root of 663667542 is about 872.2685070427.

The spelling of 663667542 in words is "six hundred sixty-three million, six hundred sixty-seven thousand, five hundred forty-two".